/Engine/Source/Runtime/UMG/Public/Components/ComboBoxString.h
Called by slate when the underlying combobox selection changes
virtual void HandleSelectionChanged ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FString](API\Runtime\Core\Containers\FString) > Item, [ESelectInfo::Type](API\Runtime\SlateCore\Types\ESelectInfo__Type) SelectionType )